Man, what a wealth of knowledge, I really appreciate the info. I was very luck to find a SCUBA/DEMO sitting covered in dust in a box at flea market when I was TDY to Pearl Harbor in 2010, and snag it along with a Randal sheath for $180. SogCollector told me it was an early production and worth a great deal more, it is now the pinnacle of my SOG collection. I am quite jealous of some of the other finds you all have come across, but I am afraid of all the knowledge we are loosing about the history of the "Extraordinary Blades" of yore. Hell to most of the guys I serve with, SOG is just another maker of relatively cheap blades at the Navy Exchange.